Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected that the pump used to check for leaks in the gas tank is using too much electricity. It's like when a toy uses too much battery power because something is wrong.
The DM TL pump is part of the evaporative emission control system, which checks for leaks in the fuel system. If the pump draws too much current, it indicates a possible fault.
The P1449 code is triggered when the diagnostic module for tank leakage (DM TL) detects that the current draw of the pump is higher than expected. This could be due to a mechanical or electrical issue within the pump or its circuit.
• Check Engine Light is on
• Possible fuel odor
• Failed emissions test
• Faulty DM TL pump
• Electrical short in the pump circuit
• Blocked or restricted pump operation
DM TL: Diagnostic Module Tank Leakage
OBD-II: On-Board Diagnostics, Second Generation
• Check for any other related codes.
• Inspect the DM TL pump and its wiring for damage.
• Test the pump's electrical circuit for shorts.
• Replace the DM TL pump if faulty.
• Repair any damaged wiring or connectors.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• BMW 3 Series
• BMW 5 Series
• BMW X5
• Regularly inspect the fuel system for leaks.
• Ensure the gas cap is properly tightened.
• Perform routine vehicle maintenance.
Sensor Issue
• Get the issue checked by a professional mechanic.
• Avoid topping off the fuel tank after the pump clicks off.
• Monitor for any fuel odors.
Check with the vehicle manufacturer for any applicable emissions-related warranties.
This code is commonly found in vehicles with aging evaporative emission systems, particularly in older BMW models.
Moderate – While the vehicle may still operate normally, emissions and fuel economy could be affected.
Driving with an active Check Engine Light may result in a failed emissions test and potential fines.
• Vehicle should be at normal operating temperature.
• Ensure the fuel tank is not overfilled.
The DM TL pump is typically located near the fuel tank or within the evaporative emissions system components.
Q: Can I drive with a P1449 code?
A: You can drive with this code, but it's best to get it checked soon to avoid potential emissions issues.
Q: Will the P1449 code affect fuel economy?
A: It might, as it indicates a potential issue with the evaporative emissions system.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.